Akira Matsunaga
22Patents
5h-index
42Co-inventors
69Inventor score
Filing activity: Jun 22, 1977 → Dec 12, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4747137A | Speech scrambler | Electricity | 75 | Expired |
| US5545349A | Bleaching composition | Chemistry; Metallurgy | 11 | Expired |
| US4363678A | Explosives having powdered ferrite magnet as a tracer dispersed therethrough and a method for producing the same | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4430664A | Glass-moulded type semiconductor device | Electricity | 7 | Expired |
| US6478947B2 | Treatment method of waste oil or waste edible oil | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6034261A | Process for the preparation of phosphoric monoester | Chemistry; Metallurgy | 4 | Expired |
| US5071585A | Phosphoric acid ester, process for preparing the same, and detergent composition containing the same | Chemistry; Metallurgy | 4 | Expired |
| US8067123B2 | Fuel cell system and shutdown method of the same | Emerging Cross-Sectional Technologies | 2 | Active |
| US4845239A | Phosphoric esters and process for preparing the same | Chemistry; Metallurgy | 2 | Expired |
| US4985412A | Phosphoric acid ester, process for preparing the same, and detergent composition containing the same | Chemistry; Metallurgy | 2 | Expired |
| US8304575B2 | Process for production of ether carboxylates | Chemistry; Metallurgy | 2 | Active |
| US6407277B1 | Process for the preparation of phosphoric monoester | Chemistry; Metallurgy | 2 | Expired |
| US4148056A | Glass-encapsulated semiconductor device containing cylindrical stack of semiconductor pellets | Electricity | 1 | Expired |
| US8940933B2 | Method for producing polyoxyalkylene alkyl ether carboxylic acid and salt thereof | Chemistry; Metallurgy | 0 | Active |
| US9895858B2 | Sheet processing apparatus, method for controlling sheet processing apparatus, and storage medium | Physics | 0 | Active |
| US11890581B2 | Membrane defect inspection method and membrane defect inspection device | Physics | 0 | Active |
| US12246290B2 | Membrane filtration device and method for cleaning membrane filtration device | Chemistry; Metallurgy | 0 | Active |
| US5043424A | Modification method for peptides and proteins by reacting with a phosphoric acid ester | Chemistry; Metallurgy | 0 | Expired |
| US11986773B2 | Membrane defect inspection method and membrane defect inspection device | Physics | 0 | Active |
| US8663858B2 | Fuel cell system and method for operating the same | Emerging Cross-Sectional Technologies | 0 | Active |
| US8534662B2 | Image forming apparatus, control method therefor, and computer-readable medium | Performing Operations; Transporting | 0 | Active |
| US7196213B2 | Process for producing phosphate | Chemistry; Metallurgy | 0 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.